Jamks  i



0264-123 Au 291 Ex Ma'o xR 304.339

(No Model.)

J. T. M0 HUGH.

, VAULT AND SEWER GRATING. N0. 304,339. Patented Sept. 2, 1884.

WILlEssEa t Z/Z/ UNITED STATES JAMES 'l`.

l-YrifNT OFFICE.

VAULT AND SEWER GRATING.

SPECIFICATION forming part of Lettera Patent No. 364.339, dated September 2, 1884-.

Application tiled Muy 1.7. if't.

To all whom z' may concern.-

Ile it known that I, .1 -mns T. Mel'IL'GH, a citizen ot' the United Sintes, residing nt Pittsburg, in the eounty 0f Allegheny :1nd Stute of lennsylrtiniu. hure invented :i new und use i'ul Improvement in Ynult'nndSewerGratings und Method 0f )[nnuieturing the Same, the object of Suid invention being' to produce :1 grating' which will present n Surface rough :is imitation of stone, eonerete.` or other plustie Substnnee, which will produce u rough surliee. und reti retain the strength and iiurzibilit \Y ot' :1 Solid metul grutine', to nttuin which object I use n ii1et:1l e'1':itii|g with hollow' rim und bnrs iilled with conm-ete. imitation ofstone, oruny other plnstie suhstnnee which will produce n rough surliee. the rim and hurs 0t` .said grat',- ing lnivingu t riungulnnshuped elezit or ril) projecting from und extending' nlonfr their interior sides. so that; when the eonerete. imitartion of stone. or other plnstie Substance is poured into the rim and bars of the `gfrdtingit becomes dovetniled therein; und myinventtion further consists in the use of Suid concrete, imitation ot'st'one, or other plastic substance as :L eore in molding the vault und sewergrnb ings heretofore described, :Suid eonerete Core remaining in nud becoming the top pzirt of the casting.

In the drawings hereto attached and made (No muri-ll purt'` ot^ tl|i-1 speeitention. Figure l Shows n top View ot'e'rutine'. Fie'. showsv :l rerlieul View ot' ending' biseeled by the line druwn through Fie'. l. Fig. Il show :l Verlieul View of the conerete, imitntion ot' stone. or other plziStie substnnee :is :i eore in molding' the gratings. Fig'. t show` :1` \'erlie;1l View ot'the hollow rim :ind bumy ot' the Ig'rntine with the triungulur-Slmped eleutor rib projecting' from und extending' :alone|` their interior lide Having thus deseribed my invention. wlmi l elnim us new7 und desire to seeure by Letters Potent. ism- 1. Asun improvement in rnult und sewer glzllintf. the lnetnl eustinj; with hollow rim und bars. Suid rim uml burs lmringu triune'uhir-. huped eleut or rib projet-.l ing' trom und e\'- tending- :dong their interior hides, in eoinbi nntion with the eonerete` imitution Stone` or other plastic tilting. to produee ngrntinr with a metal frmne und eUni-,rele top.

2. As :l method of munutueturiug thesume, the concrete, imitution stone, or other pluStie Substance ns :i core in molding vuult und sewer gruting, the, eore remainingl in und beeomine' the top port ofthe grnting.

JAMES T. )lelli'tllL 

